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FizzKit

Aspect Ratio Calculator

Input three of four values (width, height, and aspect ratio terms) and the calculator solves for the missing one. Supports common ratios (16:9, 4:3, 21:9) and custom inputs.

Runs locally in your browser
Aspect ratio
:
Dimensions
Preview
1920 × 1080
Ratio
16:9
Simplified
16:9
Decimal
1.7778
From dims
16:9
Dimensions
1920×1080
Megapixels
2.07 MP
CSS aspect-ratioaspect-ratio: 16 / 9;
Padding-top hackpadding-top: 56.2500%;
HTML<img src="..." width="1920" height="1080" />

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About Aspect Ratio Calculator

Input three of four values (width, height, and aspect ratio terms) and the calculator solves for the missing one. Supports common ratios (16:9, 4:3, 21:9) and custom inputs.

Aspect Ratio Calculator is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

16:9, 4:3, 21:9, 1:1, 3:2, 9:16, and 2.35:1 (cinematic). Custom ratios can be entered directly.